When Tumblr introduced in-stream sponsored posts last spring, skeptics predicted millennials would flee. But the blogging site soared to 47 million visitors in October, up 42 percent since the ads debuted, per comScore.
When Tumblr introduced in-stream sponsored posts last spring, skeptics predicted millennials would flee. But the blogging site soared to 47 million visitors in October, up 42 percent since the ads debuted, per comScore.
